This is in fact a very interesting paper. It shows how Sun and Belgacom used NEBS/ETSI certified Sun Netra servers and FFAC (Full Free Air Cooling) to eliminate the CRAC (Computer Room Air Conditioning). To caricaturize, they used systems engineered to withstand high temperatures (Netra servers) and opened the data center windows to cool them down. Based on the results of this proof-of-concept, the projected decrease of power consumption to cool the facility down is up to 40 percent. Quite dramatic! Obviously, it probably helps if the data center is located in Belgium and not in the middle of Arizona on a hot summer day!

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